Guides: recording and reading data logs

How to record and read engine data logs: VCDS, ME7Logger, VehiCal, MHD, OpenFlash Tablet, JB4, Cobb Accessport, RomRaider and more.

• How to record a VCDS log: step by step

  How to record a log in VCDS: which measuring groups to pick (TDI, 1.8T, TFSI), how to drive during the pull, where to find the CSV file and which mistakes to avoid.

• How to read a TDI boost log in VCDS (groups 011, 003, 008)

  Group 011 specified vs actual boost, N75 duty, air mass (003) and fuel limits (008). Values for 1.9 TDI VE and PD engines, typical faults and fault codes.

• TDI injector corrections in VCDS: groups 013, 018 and 023

  Group 013 quantity deviation per cylinder, PD injector status (018) and switch time (023): specified values, which injector fails and what to check first.

• How to read a 1.8T boost log in VCDS (groups 115 and 118)

  Group 115 specified vs actual boost, group 118 N75 duty and intake temperature on the 1.8T 20V: Audi test values, typical faults and fault codes.

• 1.8T ignition timing retard in VCDS: group 020

  Knock control retard per cylinder in group 020 on the 1.8T: what it means, the Audi 0–11.25° check, typical patterns and what to check first.

• 1.8T fuel trims in VCDS: group 032

  Additive and multiplicative fuel trims in group 032 on the 1.8T: what plus and minus mean, Audi specified ranges, group 033 and lean mixture codes.

• How to check the 1.8T MAF sensor in VCDS: group 002

  Air mass in g/s in group 002 on the 1.8T: the 2.0–4.5 g/s idle check, the 0.8 × hp rule of thumb, and a bad MAF vs a leak or underboost.

• How to find an intake or boost leak on the 1.8T with VCDS

  Unmetered air, pressure-side and exhaust leaks on the 1.8T: what groups 032, 115 and 002 show, where to look and how to confirm a leak safely.

• 1.8T misfires in VCDS: groups 014, 015 and 016

  Misfire counters per cylinder in groups 014–016 on the 1.8T: the recognition status, the Audi idle check, one cylinder or all, and P0300–P0304.